Pixel electro controls manufactures economy range of ups systems that come with built-in maintenance-free batteries and a host of salient features like automatic voltage regulation, auto restart, and over-voltage and over-current protection. Other features include: line noise and surge suppression, overload protection, minimum switch over time, built-in maintenance-free batteries, battery over discharge protection, extended battery runtime; discriminative alarm system, automatic recharging of batteries, dependable high performance, auto save features, telephone line protection for modem, no load off, etc.